Automatic brake mechanism for phonographs.



F. H. ADAMS.

AUTOMATIC BRAKE MECHANISM FOR PHONOQRAPHS. APP-LICAIION FILED. MN- 22.I915- RENEWED DEC. 1.4916.

Patented Jan. 16, 1917.

NORRiS FEYERS, W-CH LITHO.. WASHiNGTON. D Cu "ED sTATEsPATENT DFFICEFRANK H. ADAMS, or CLEVELAND, oI iIo.

'tion;

AUTOMATIC'BRAKE MECHANISM FOR PHONOGRAPHS.

, Application fi led'ianuar 22, 1915, ste m; 3,673. Renewed December 1,1916. Serial No. 134,500..

To all whom it may concern Be it known that I, FRANK H. ADAMS, a States,residing at Cleveland, inthe county of Cuyahoga-and State ofOhio,have'inve nted a certain new and useful Improvement in Automatic BrakeMechanism for Phonographs, of which the following is a full, clear,

The invention is adjunctive in character andis especially adapted foruse in connection with disk phon'ogrfap'hs, and may be applied to anydisk phonograph without involving Ianychange in any part of saidphonograph.

One'object of the invention is to provide a cheap and easily applieddevice which will automatically stop the phonograph when the playing ofa record thereby'has been completed. g l

Another object is to provide a stopping device in a form such that it mbe easily and ,quickly adjusted to perform its functions w th any recordregardless of the distance between the c'enterof the record disk and the:point' thereon at which the reproducing grooves end. 7 I i Anotherobject is to provide a stopping device .in a form such that it does notinterfere with utting arecord on or taking it from the p onographturntable,

The invention consists in the construction and comblnation of partsshown in the drawing and hereinafter described and pointed outdefinitely in the appended claims.

' In the drawing, Figure '1: is a plan view of the invention applied toa phonograph; Fig. 2 is abottom view ofthe device; Fig. 3 is a verticalsectir through the outer part of the stop. mechanism; and Fig. fl is anelevation of the devic and so muchof the phonograph as cooperatestherewith.

The application of this invention to, and its use with, any diskphonograph, does not involve any change whatever in the construction ofthe phonograph itself, although the said invention is caused-to beoperated by stain partsof said phonographf The parts l h pho aphwhichcoijp'elate With invention include the turntable 3 upon which adiskrecord 4 may be supported, the tone arm5 which is mounted to swingfreely upon a vertical axis, andsome'part carriedby the tone arm,preferably the needle 6. An arm '10 extends horizontally over theturntable and the disk record thereon from one side Specification ofLetters Patent.

and exact descrip= witheach other Patented-Jan. 16, 1917.

to a point: beyond the place Pat which the reproducing grooves on thedisk record will end. A spring-actuated brake'lever 121s pivoted on avertical pivot ad acent to the edge of the turntable and in suchposition that when released from restraint the brake' lever, actuated byits spring 1l,'will swing is a finger 14: which is adapted to enter anotch 13 that is formed in the arc-shaped edge of the said arm 13. Thearm 10 is provided near its free end with a longitudinal slot 10. A stud16 is slidable in this'slot and may be fixed to the arm at any pointthereon within its range of travel. In the particular construction shownthe part of the stud which passes through this slot is threaded toreceive a nut 17. By tightening this nut the stud may be secured to thearm at any desired point thereon. A cam 18 is' pivoted to the projectinglower end of the stud, and this cam is always in contact with an edge ofthe catch lever near the outer end thereof, 20 which projects into thepath of some part of, or attachment to. the swinging tone arm 5.Preferably this finger projects into the path of the needle 6.

The described device operates as follows: lVhen a record disk 4: beingput onto the turntable the arm 10 will be in the position indicated bydotted lines in Fig. l which shows a part of said arm. lVhen the recorddisk is'on the turntable the-arm will be swung to position shown by fulllines in the catch lever lat will be moved by the spring 11 so as topush the catch finger 14 into the notch 13 and thereby the armlO will beheld in the stated position. Then the stud 16 will moved along the "arm10, as

required, tobring the "end of the 'trlp finger 20 directly over a partof thefdisk'record on which the non reproducing grooves are 13 of abracket 15, which is.

Fixed to this cam is a trip finger which are formed on each record diskfor the needle to travel in after the record has been played. lVhen thistrip finger has been properly positioned, the stud maybe fixed to thearm 10 by screwing down the nut 17.

As the record is being played the tone arm.

will be gradually swung toward the center of the turntable, the needle 6traveling in the reproducing spiral grooves of the record. Just as theneedle passes out of these reproducing grooves and into the othernonreproducing grooves, it will engage the trip finger 20 and move it sothat the cam will move the catch lever 14 and thereby withdraw the catchfinger 1% from the. notch 13. Immediately thereafter this arm, actuatedby its spring 11, will swing toward the position indicated by the dottedlines in Fig. 1; and, of course, the brake lever 12 will also swinguntil its braking surface engages the periphery of the turntable andstops its rotation.

In the specific pivot stud 21 on which the arm 10 is pivoted to thebracket arm 13, extends down a considerable'dist-ance; and the spring11, which is a spiral spring, embraces it and has one end connected withthe bracket 15. The other end is bent up so as to engage the edge oflever 14. Therefore, this one spring actuates both the catch lever andthe swinging arm 10,-and this because after the spring has moved thecatch lever as far as it will go relatively to said arm, it willcontinue to exert its force on the arm itself.

It is to be understood that the specific con struction shown, while thebest embodiment of the invention known to me, is merely one specificform of an invention which may be embodied in many different specificforms. The fundamentally novel feature of the invention is the arm whichextends over the record and carries a movable trip finger which projectsinto the path of some part carried by the tone arm of the phonograph,and is adjustable lengthwise of said arm so that it will 'be engaged andmoved with the result of causing the brake to set when the negdlereaches any desired part of the recor Having thus described myinvention, what I claim is v 1. A stopping attachment for diskphonographs of the type having a rotary turntable and pivoted tone arm,comprising in combination a pivoted arm adapted to extend horizontallyover a part of a disk upon the phonograph turntable, a spring forswinging said arm away from said position, restraining means preventmgthe springconstruction shown the induced movement of said arm, a brakefor stopping the phonograph which is moved in the brake applyingdirection by the springinduced movement of said arm. a trip lingercarried by said arm and adaptedto project into the path of a part of thephonograph which is carried by the tone arm thereof. and means wherebythe trip linger by its movement releases said arm from said restrainingdevices.

2. A. stoppingattachment for disk phonographs .of the type having arotary turntable and pivoted tone arm. comprising in combination apivoted arm adapted to extend horizontally over a part of a disk uponthe phonograph turntable, a spring for swinging said arm away from saidposition. restraining means preventing such spring induced movement, abrake for stopping the phonographwhich is moved in the brake applyingdirection by the spring induced movement of said arm, a trip fingerwhich is adjustable lengthwise of said arm and adapted to project intothe path of a part of the phonograph which is carried by the tone armthereof, and means whereby the trip finger by its movement releases saidarm from said restraining devices.

3. A stopping attachment for disk phonographs of the type having arotary turntable and pivoted tone arm, comprising in combination apivoted arm adapted to extend horizontally over a part of a diskrecordupon the phonograph turntable, a

bracket arm to which said arm is pivoted, which bracket arm is providedwith an areshaped edge in which there is a notch, a catch lever pivotedto said arm and having a finger adapted to enter said notch, a campivoted to said arm in position to engage with said catch lever, a tripfinger connected -with said cam and adapted to project into the path ofa part of the phonograph which is supported on the swinging tone armthereof, a spring acting to swing said arm away from its initialposition and a brake adapted to be operated by the spring-inducedmovementhof said arm, for stopping the phonogr p 4. A stoppingattachment for disk phonographs of the type having a rotary turntableand pivoted tone arm, comprising in combination a pivoted arm ada ted toextend horizontally over a part 0 a disk record upon the phonographturntable, a bracket arm to which said arm is pivoted, which bracket armis provided with an arc-shaped edge in which there is a notch, a catchlever 'tone arm thereof, a spring acting to. swing said arm away fromits initial position, and a brake adapted to beoperated by thespringinduced movement of said arm for stopping nation a pivoted arm adaptedto extend horizontally over a part of a disk record upon the phonographturntable and'a brake arm rigidly fastened to said swinging arm, aspring acting upon said arm to swing it .away from the position statedand to a position. such that the brake arm will engage with theperiphery ofthe' turntable, means restraining said arm from moving inthe direct-ion which it is impelled to move by said spring, and a" tripfinger carried by said'arm'and adapted to project into the path .of apart which is carried by the swinging tone arm of the phonograph, andmeans whereby the movement of said trip finger will disconnect theswinging arm.

from said restraining devices.

horizontal arm whose edg 6. A stopping attachment for disk phone graphsof the type having'a rotary turntable. and pivoted tone arm, comprisingin com-t binhtion a. fixed bracket adapted to'be 10-,

cated outside of said turntatg'e andhaving a and is formed with a notch,a spring actuated arm pivoted to said bracket arm, a

brake fixed to said pivoted, arm, a spring actuated catch lever mountedon said swinging arm and provided with a finger adapted to enter saidnotch, a-cam stud carried by and adjustable along said swinging arm, a

is arc-shaped cam pivoted on said stud in position to engage a part ofsaid catch lever, and a trip nger fixed to said cam and extendedtherefrom to a position such that it may be en-

